100% private  ·  No file limits  ·  Free forever

Compress image
to 10KB.

Shrink a signature or small photo to a JPG under 10 KB — the strictest limit most forms ask for. Nothing leaves your device.

Output: JPG under 10 KB — change it after upload

Drop images here  or  browse files

Paste Ctrl+V to compress screenshots instantly

PNG JPEG WebP GIF BMP AVIF
No server uploads Unlimited files & sizes MozJPEG · oxipng · libwebp

# File size tools

How to reduce image size to 10KB

10 KB is about the size of a short text message with a tiny icon attached — and it is the upper limit some portals set for scanned signatures. Getting a photo there is hard: at this size even small dimension changes matter more than the quality slider.

This tool searches for the highest JPEG quality that stays under 10,000 bytes and, when quality alone is not enough, scales the image down in smooth steps. Because signatures are mostly white paper, they usually fit comfortably if you crop tightly first.

  • Strict-limit safe

    We aim for 10,000 bytes, so the file passes whether the form counts 1 KB as 1000 or 1024 bytes.

  • Crop first, win more

    A tight crop is the single biggest lever at 10 KB — the tool handles the rest.

  • Private

    Signatures are identity data. Yours is processed on your own device and never uploaded.

Steps to get an image under 10KB

  1. 1

    Crop the image tightly — empty margins eat into a 10 KB budget.

  2. 2

    Drop it in the box above. A JPG under 10 KB is produced automatically.

  3. 3

    Check the size and dimensions on the result card, then download it. Need a bigger limit? Change “Max size”.

Where a 10KB limit shows up

Scanned signature JPG, often 10–20 KB (sometimes stricter)
Thumb impression (strict portals) JPG, usually 20 KB or more
Small profile avatar JPG or PNG, a few KB to tens of KB

Limits differ between exams and change between years — always follow the exact size, dimensions and format in your official notification.

# FAQ

Compress to 10KB: common questions

Is it possible to compress an image to 10KB without it looking bad?

For a signature or a simple logo, yes. For a detailed photo, 10 KB means visible softness — scaling the image down and keeping dimensions small gives a cleaner result than a large, heavily compressed picture.

Why is my result a bit smaller than 10KB?

Forms set a maximum, so the tool stays just under it. Landing at 9.5 KB is intended.

Does it work for PNG and WebP inputs?

Yes. Any common image is converted to a JPG so the size limit can be met reliably; transparent areas are filled with white.

What if I need 20 KB instead?

Change “Max size” after adding the file, or use the dedicated compress-to-20KB page.